air data test set mps 30 digital portable user manual - CALIBRATION ...

MPS 30 User’s Manual DMMC/0803/CM
- after a few seconds, the total pressure will be exactly equal to the static one,
the resolution increases and it will be possible to read airspeed from 2 (two)
kts.
The readings have no decimal points from 2 to 20 kts (i.e. 4 kts), from 20 kts to
the Max allowed AS, the readings have one decimal point (i.e. 22.4 kts).
When very low airspeed must be generated, it is suggested to leave the static
port open to ambient with altitude rate (AR) regulated at zero and connect only pitot
port at pitot UUT (unit under test) port.
To exit this function, operate the Fg key.
8.12 “Control Loss” Function
This function shuts off the pressure control when the volume is too high to be
emptied or filled up at the desired rate (it usually happens when the ADTS is not
connected to any closed volume and its hosed are left opened in ambient).
The function avoids the running of the flow valves if the operator does not
connect the pneumatic hoses to the instrumentation and, at the same time,
commands the ADTS to reach an altitude different from the barometric one and/or an
airspeed different from “zero”.
The function starts to operate if the volume becomes too high for the
commanded rate (leaving the pneumatic hose open at ambient is like connecting the
ADTS to a very big volume).
The intervention of the protection is commanded by “DcSMx” and “DcDMx”
parameter in the “fine-tuning” list, accessible with the function “Fz”.
“DcSMx” sets-up the intervention point to protect the static line.
“DcDMx” sets-up the intervention point to protect the Pitot line, the intervention
depends on the set-up values.
Increase the parameter’s value to reduce intervention of the function.
8.13 “Enhanced Resolution Function”
The “Ff” key activates the enhanced resolution function for pressures reading.
The “er” writing appears in pressure section of HHRCU. To go back to normal
resolution press “Fg” key.
Issue Aug. 03 D. Marchiori PROPRIETARY INFORMATION - 30
This material not to be disclosed or reproduced.